Pivotal Concourse up to 4.2.1 Login Flow redirect

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Pivotal Concourse up to 4.2.1. It has been rated as critical. This issue affects an unknown code block of the component Login Flow. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Pivotal Concourse Release, versions 4.x prior to 4.2.2, login flow allows redirects to untrusted websites. A remote unauthenticated attacker could convince a user to click on a link using the oAuth redirect link with an untrusted website and gain access to that user's access token in Concourse.

The bug was discovered 12/17/2018. The weakness was published 12/19/2018 (Website). The advisory is shared at pivotal.io. The identification of this vulnerability is CVE-2018-15798 since 08/23/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 4.2.2 eliminates this vulnerability.

Similar entry is available at VDB-155239.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 7.6
CNA Vector (Dell): 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Redirect
CWE: CWE-601

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Concourse 4.2.2


08/23/2018 🔍
12/17/2018 +116 days 🔍
12/19/2018 +2 days 🔍
12/19/2018 +0 days 🔍
12/20/2018 +1 days 🔍
06/19/2023 +1642 days 🔍


Vendor: pivotal.io

Advisory: pivotal.io
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-15798 (🔍)
See also: 🔍


Created: 12/20/2018 07:36 AM
Updated: 06/19/2023 08:21 PM
Changes: 12/20/2018 07:36 AM (59), 04/21/2020 09:16 PM (2), 06/19/2023 08:21 PM (14)
Complete: 🔍
Cache ID: 100:D83:40


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